﻿/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 * Copyright (c) The DotNetty Project (Microsoft). All rights reserved.
 *
 *   https://github.com/azure/dotnetty
 *
 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
 *
 * Copyright (c) 2020 The Dotnetty-Span-Fork Project (cuteant@outlook.com) All rights reserved.
 *
 *   https://github.com/cuteant/dotnetty-span-fork
 *
 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
 */

namespace DotNetty.Transport.Channels.Groups
{
    using System;
    using System.Collections;
    using System.Collections.Generic;
    using System.Collections.ObjectModel;

    public class ChannelGroupException : ChannelException, IEnumerable<KeyValuePair<IChannel, Exception>>
    {
        readonly IReadOnlyCollection<KeyValuePair<IChannel, Exception>> _failed;

        public ChannelGroupException(IList<KeyValuePair<IChannel, Exception>> exceptions)
        {
            if (exceptions is null)
            {
                ThrowHelper.ThrowArgumentNullException(ExceptionArgument.exceptions);
            }
            if (0u >= (uint)exceptions.Count)
            {
                ThrowHelper.ThrowArgumentException_Excs();
            }
            _failed = new ReadOnlyCollection<KeyValuePair<IChannel, Exception>>(exceptions);
        }

        public IEnumerator<KeyValuePair<IChannel, Exception>> GetEnumerator() => _failed.GetEnumerator();

        IEnumerator IEnumerable.GetEnumerator() => _failed.GetEnumerator();
    }
}